US Patent No: 6,112,100

Number of patents in Portfolio can not be more than 2000

Method and apparatus for synchronizing a base station in a communication system

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Importance

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Abstract

A method and apparatus synchronize a first floating timing reference (207) of a first base station (116) with a timing reference of a second base station (116) of a communication system, without requiring an interruption of normal user traffic through the communication system. A receiver (208) of the first base station monitors (402) a user traffic transmission of the second base station, thereby generating a received signal, and a processing system (206) of the first base station derives (410) a received timing reference (308) from the received signal. The processing system independently adjusts (426, 428) the first floating timing reference according to the received timing reference, without requiring a timing adjustment instruction from a centralized synchronization controller.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOTOROLA MOBILITY LLCLIBERTYVILLE, IL5841

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goldberg, Steven Jeffrey Downingtown, PA 77 321
Hill, Thomas Casey Crystal Lake, IL 35 710
Ossoinig, Karl Heinz Fort Worth, TX 1 25

Cited Art

Patent Info (Count) # Cites Year
 
INTELLECTUAL VENTURES II LLC (1)
5,363,376 Method and apparatus for synchronizing timing among radio ports in wireless communications systems 51 1993
 
NEC CORPORATION (1)
5,608,765 Radio frame synchronization system 22 1995

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
STRIX SYSTEMS, INC. (5)
7,016,325 Link context mobility method and system for providing such mobility, such as a system employing short range frequency hopping spread spectrum wireless protocols 28 2002
7,194,010 Wireless base station to base station synchronization in a communication system, such as a system employing a short range frequency hopping or time division duplex scheme 7 2002
7,151,757 Wireless base station to base station synchronization in a communication system, such as a system employing a short-range frequency hopping or time division duplex scheme 4 2002
7,251,489 Wireless base station neighbor discovery in a communication system, such as a system employing a short-range frequency hopping scheme 4 2003
7,546,126 Wireless base station neighbor discovery in a communication system, such as a system employing a short-range frequency hopping scheme 3 2007
 
WI-LAN INC. (5)
8,064,444 Wireless broadcasting system 2 2007
7,944,919 Connection identifier for wireless broadcast system 3 2007
7,912,057 Convergence sublayer for use in a wireless broadcasting system 2 2007
7,903,604 Method and apparatus for a scheduler for a macro-diversity portion of a transmission 0 2007
8,130,664 Macro-diversity region rate modification 1 2008
 
AIRHOP COMMUNICATIONS, INC. (1)
8,254,355 Method and apparatus for utilizing a second receiver to establish time and frequency 1 2009
 
ALCATEL (1)
6,269,090 Telecommunication system, radio system, and method 1 1998
 
AT&T INTELLECTUAL PROPERTY II, L.P. (1)
8,116,260 Simulcasting MIMO communication system 0 2001
 
CELLCO PARTNERSHIP D/B/A VERIZON WIRELESS (1)
6,993,363 Wireless monitor tool for a mobile station 8 2002
 
CISCO TECHNOLOGY, INC. (1)
6,975,877 System and method for synchronizing clock dividers in a wireless network 6 2001
 
FUJITSU LIMITED (1)
6,631,142 Delay correction system for wireless telephone system 8 2000
 
INTEL CORPORATION (1)
6,954,643 Criteria for base station selection, including handover, in a wireless communication system 16 2003
 
KABUSHIKI KAISHA TOSHIBA (1)
6,480,483 Frame synchronization system between base stations of mobile radio communication system and base station device employing this system 22 1998
 
MOTOROLA MOBILITY LLC (1)
7,450,944 Method and apparatus for base station synchronization 3 2005
 
NEC CORPORATION (1)
6,477,385 Mobile communication system and method for establishing synchronization in mobile communications 6 1999
 
NOKIA NETWORKS OY (1)
6,847,826 Method of synchronization of a base station network 40 2000
 
QUALCOMM INCORPORATED (1)
6,532,226 Method and arrangement for optimal scheduling of slotted-mode related measurements in a cellular radio system 20 1999
 
SIEMENS ENTERPRISE COMMUNICATIONS, INC. (1)
6,456,614 Method and system for wireless communication incorporating distinct system identifier bytes to preserve multi-frame synchronizaton for systems with limited control channel bandwidth 9 1999
 
TELECOMMUNICATIONS RESEARCH LABORATORIES (1)
7,324,559 Centralized synchronization for wireless networks 11 2001
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (1)
6,735,222 System and method for time slot offset evaluation in an asynchronous TDMA network 0 1998